21014143211 has 4 divisors (see below), whose sum is σ = 21358637424. Its totient is φ = 20669649000.

The previous prime is 21014143201. The next prime is 21014143219. The reversal of 21014143211 is 11234141012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21014143211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014143219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172247015 + ... + 172247136.

It is an arithmetic number, because the mean of its divisors is an integer number (5339659356).

Almost surely, 2^21014143211 is an apocalyptic number.

21014143211 is a deficient number, since it is larger than the sum of its proper divisors (344494213).

21014143211 is an equidigital number, since it uses as much as digits as its factorization.

21014143211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344494212.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21014143211 its reverse (11234141012), we get a palindrome (32248284223).

It can be divided in two parts, 210141 and 43211, that added together give a palindrome (253352).

The spelling of 21014143211 in words is "twenty-one billion, fourteen million, one hundred forty-three thousand, two hundred eleven".